I recently came across this article suggesting that crisscrossing the grafts is the best option. I'm already in year 3, so is this even still doable at this point? I'm concerned about breaking the grafts at this point.
extension.psu.edu
Apple Top-Working: Managing the New Grafts
Top-working is the name for grafting established trees to another variety. The existing tree, the "stock", is cut back, leaving just one or two limbs (nurse limbs) to supply the tree with energy.
extension.psu.edu
